can anyone tell me whats wrong with my system. i have two 10 inch infinity subs and an infinity amp conected to the factory radio. the problem is my bass will fade outhen i step on the gas going over 40 mph now i was told that sometimes trucks will have a voltage max so when the voltage gets to high it will kill the amp to not harm it. is that true and is it fixable ? thnx for any help

 

Yes, it is true that amps shut off when the voltage gets above a certain voltage. This keeps from frying the amp. Amps normally kick into protect mode when the current gets above 14.3 volts. If your voltage is getting this high, it normally means that your voltage regulator is bad, which should cause your voltage warning light to come on (battery icon on the dash display). if this is the case, you will need to replace your alternator. If your light is not on, test the voltage reading. To do this, get a voltmeter and test your readings at the battery or test at the amp's power terminal. Good luck!

 

hey thnx for replying so fast. i will check into what you had said. what i want to ask you is if it reads ok what could i do to make it work right?cause i changed the battery to a yellow top optima battery thinking that was the problem but it still occured and the battery light has never come on. i have a 2008 fx4 with 9500 miles so its fairly new bought it brand new thnx again

 

u might be have a loose connection, ground, or voltage drop, prolly not volt spiking,check ur wiring, it should be the issue

 

My first thought was the voltage regulator becasue I destroyed two amps due to that exact issue. JJDH could be correct as well though......could also be a loose connection or a bad ground. I doubt that it may be a voltage drop since it occurs when you accelerate (that's normally when voltage is at its highest). A short ground is the best ground and be sure that it's at least the same guage wire as the amp's power wire. Yellow top is the way to go. I ran one HARD for years, but remember that your battery supplies voltage only when the engine is off. Check your connections (ground in particular) and let us know how it goes.